China will be forced to wait at least another nine months in order to claim it is home to the world’s tallest building after delays hit construction of the 2,750-foot (838-meter), 220-story high Sky City tower in Changsha. Developer BSB was originally scheduled to break ground in June and hoped to complete the work by the end of the year thanks to its prefabricated method of construction. While work began last week, Sky City’s completion date has been pushed back to April 2014, allowing Dubai’s Burj Khalifa — which stands at 2717 feet — to retain its record for a little longer.